Pivot bearings



1961 cs. E. w. LEWIN 3,013,296

PIVOT BEARINGS Filed April 18, 1960 4 Sheets-Sheet 1 AWORA/EKS Dec. 19,1961 G. E. w. LEWIN PIVOT BEARINGS 4 Sheets-Sheet 2 Filed April 18, 1960FIG.6

//VI/E/VTOR Gan/Tar 15 WL ewm ATTORNEYS G. E. W. LEWIN PIVOT BEARINGSDec. 19, 1961 4 Sheets-Sheet 3 Filed April 18, 1960 FIG.8

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FIG.11

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PIVOT BEARINGS 4 Sheets-Sheet 4 4'8 5'2 F l G .14/ L1 ATTORNEYS "UnitedStates Patent G PIVOT BEARINGS Gunnar Erik Werner Lewin, Viggbyholm,Sweden, assignor to Aktieholaget Atvidabergs Inredningar, Stockholm,Sweden, :1 ioint-stock company of Sweden Filed Apr. 18, 1960, Ser. No.22,923 Claims priority, application Sweden Apr. 30,1959 2 Claims. (Cl.16-140).

The invention relates to pivot bearings and the like for horizontally orvertically pivoted window sashes, comprising separable units, intendedfor the window sash, and the window frame respectively, and adapted tofrictionally retain the window sash in the desired open position.

More particularly still the invention relates to such a pivot bearingfor window sash in which the bearing has a single rotational axis andwhich is so arranged that the mounting means for the sash is readilydisengaged from the portion of the pivot bearing mounted on the frame sothat the sash can be removed for washing and the like.

This is attained by providing means whereby when the window is pivotedto a specific position, preferably 180 of rotation from the fully closedposition, the sash can be lifted from the frame.

In addition, the bearing member is provided with friction disks, somemounted for rotation with the sash and others held stationary withrespect to the window frame, the disks being spring-urged intoengagement with each other whereby the pivotal movement of the window isagainst friction and the window will remain in an adjusted position.

Furthermore, means are provided to limit the pivotal movement of thewindow sash to a desired angle for ventilation purposes whichcontributes to safety in that the window cannot be opened so widely asto endanger the lives of those who may inadvertently lean against it.

It is an object of the invention to provide a small compact pivotbearing for window sash in which a single immovable pivot point isprovided.

It is another object of the invention to provide such a pivot hearingwhich has a friction braking arrangement incorporated therein.

It is a further object of the invention to provide for mounting the sashon the bearing in such manner that it may be readily removed when thewindow is in a single desired position, but is at other times firmlyheld to the bearing.

It is a still further object of the invention to provide a window sashpivot bearing as indicated above including means for limiting theopening movement of the sash.

Other objects and features of the invention will be apparent when thefollowing description is considered in connection with the annexeddrawings, in which,

FIG. 1 is a front elevational view of a mounting plate provided formounting on the sash of a horizontally pivoted window;

FIG. 2 shows a similar front elevational view of the pivot bearing whichis mounted on the window frame, it being understood, however, that themounting means of FIGS. 1 and 2 may be interchanged; k

FIG. 3 is a side elevational view of the mounting plate of FIG. 1; 7

FIG. 4 is a side elevational view of the pivot bearing and mountingplate of FIG. 2;

FIG. 5 is a side elevational view similar to the view of FIG. 4 butshowing the mounting plate of FIG. 1 in posi tion on the bearing of FIG.2 and the mounting plate of FIG. 1 rotated through 180";

FIG. 6 is a vertical cross-sectional view of the bearing and mountingplates of FIGS. 1 and 2 taken on the plane of the line VI-VI of FIG. 2;

FIG. 7 is a vertical cross-sectional view of the device of the precedingfigures, the section being taken on the plane of the line VII-VII ofFIG. 6;

FIG. 8 is a side elevation of a mounting plate similar to the plate ofFIG. 1, but adapted for use with a vertically pivoted sash; I

FIG. 9 is a side elevation of the pivot bearing mounted ordinarily onthe window frame and cooperating with the plate of FIG. 8;

FIG. 10 is a top plan view of the mounting plate and bearing of FIG. 9;

FIG. 11 is an end elevation of the mounting plate of FIG. 11 viewed fromthe right;

FIG. 12 is an end elevation of FIG. 9 viewed from the right;

FIG. 13 shows a device which is mounted at the top of the window frameand sash forming the upper hearing. This view is taken from the innerside of the window and is thus a front elevation as one faces thewindow;

FIG. 14 is a top plan View of the bearing of FIG. 13;

FIG. 15 is a vertical cross-sectional view of the device of FIGS. 13 and14, the view being taken on the plane of the line 15-15 of FIG. 14; and

FIG. 16 is a view similar to FIG. 15 but showing the parts operated intoposition for removing the window sash from the frame.

Referring now to the drawings and especially to FIGS. 1 through 7, thereference numeral 1 denotes a mounting plate intended for the windowframe, and 2 denotes a mounting plate intended for the window sash. Thereference numeral 3 (see FIGS. 6 and 7) denotes a pin fixed to themounting plate 2. That part of the pin which is fixed in said mountingplate, is non-circular and is traversed by a bore 4, the ends of whichare enlarged (see FIG. 6). The reference numeral 5 designates a circularcasing having a plane bottom 6 and a lateral depression 7 in itscircumference. Said depression functions as a stop against rotation. Thereference numeral 8 denotes a recess or notch in the outer edge of thecasing 5.

A cylindrical casing 10 is inserted within the casing 5, the planeclosed end 10a of easing Illbeing provided with a diametricallyextending depression 11. Mounted on the exterior Surface of the closedend 1001 is a split plate la, the facing edges of the split extendingparallel to the edges of depression 11. Thus a slit, T-shaped incrosssection, is formed, one end of which communicates with the recess8.

A T-shaped flange 9- is fixed to the mounting plate 1, this flange beingadapted to be inserted through the groove formed by the depression 11and the slit 11a. The depression 11 is provided with a transverse,arcuate slit 12 (FIG. 2) adapted to be entered by an outwardly directedarcuate flange 13 of a plate 14-. Thus flange 13 will fit into a recess15 in the T-shaped flange 9, and will interlock the two parts of thebearing device during their rotation, the

. flange 13 being notched to permit entry of the If-flange 9 in but oneposition of the casing 10.

A screw 16 (FIG. 6) is mounted in the pin 3 and screwed into a circulardisk 17'. Screw 16 at its end 18 is passed through a hole, 19 in thedepression 11, the end 18 being upset or provided with a locking ring'in order to hold the two casings 5 and lllvtogether." The referencenumeral 20 designates a convex circular spring washer which is mountedon pin 3. When the screw 16 is screwed into the disk 17, said springwasher transmits and distributes the increasing pressure on the screw toplate 14. The reference numerals 21 and 22 denote circular plates whichare provided with holes 23 in which the non-circular pin 3 can rotate.The plates are provided with radially extending tongues 24 and 25which."

enter into slits 26 and 27 in the inwardly directed part of the innercasing and are thus prevented from rotating relative to casing 10. Theplate 14 and circular plates 28, 29 are provided with non-circularcenter holes 30 corresponding to the cross section of the non-circularpin 3 and are thus prevented from rotation relative to the pin 3. Theplates 28 and 29 have radially extending tongues 31 and 32 which, duringthe rotation of the hearing device, are stopped by the depression 7 inthe casing 5 and thereby limit the rotation of the bearing device.Between the plates 14, 21, 22, 28, 29 and between the bottom 6 of thecasing 5 and the mounting plate 2 there are provided plates 1) havingcenter holes admitting of rotation around the pin 3. These plates aremade of a very frictional material, e.g. Dacron, nylon or the like. Thereference numeral 33 denotes a stop pin adapted to be screwed into orinserted in the mounting plate 2. The inwardly directed end of said pinenters into a circular slit 34 in the bottom 6 of the casing 5 andlimits the rotation of the bearing device.

In the bearing device according to FIGS. 8 to 12 the device is adaptedfor a window rotating about a vertical axis. The reference numeral 35denotes the mounting plate for the window sash and 36 the mounting platefor the window frame. The reference numeral 37 denotes a rectangular baron the mounting plate 35, said bar being intended to be fitted into adepression 38 in a casing 39, which is rotatably arranged in the samemanner as previously described with respect to FIGS. 1 to 7. Thereference numeral 40 denotes a support flange on the plate 36.

The device according to FIGS. 13 to 16 is intended for use as upperpivot fitting in vertical pivoted sashes. The window frame is denoted by41 and the window sash by 42. The reference numerals 43 and 44 denotestop flanges fixed to the window frame, and the window sashrespectively. A mounting plate 45 is fixed to the window frame 41, e.g.by screws. A sleeve 46 is arranged perpendicularly on said mountingplate. The reference numeral 47 denotes a mounting plate fixed to thewindow sash 42, e.g. by screws. A sleeve 48 is arranged perpendicularlyon said mounting plate 47. The reference numeral 49 denotes a stud whichis rotatably and displaceably mounted in the sleeve 48 and provided witha bottom hole 50, said stud being fitted to the sleeve 46. The end of ascrew 51 is rotatably mounted in said hole 50. The reference numeral 52denotes a part of the screw 51 passing through a threaded hole in themounting plate 47 and formed as a handle. The screw is provided withouter threads 53 near the handle as well as with inner threads 54 which,like the threads 53, fit the threads in the hole of the mounting plate47 According to FIGS. 1 and 2 the two halves of the bearing device areseparate from each other, and the mounting plate 2 is turned through180. The mounting plate shown in FIG. 1 with its elements is to bemounted in the middle of the sides (not shown in the drawings) of thewindow frame, with the T-shaped flange 9 directed towards the depression11. The mounting plate 2 shown in FIG. 2 with itselements is to bemounted in the sides (not shown in the drawings) of the respectivewindow sash, opposite the bearing parts according to FIG. 1 mounted onthe window frame. When the sash is to be hung in the frame, the bearinghalves according to FIG. 2 are inserted in the bearing halves accordingto FIG. 1 in the frame, the flanges 9 entering into the depressions 11and stopping against the insides of the casing 5. The window sash, andthus also the bearing half according to FIG. 2, is now swung backthrough 180 to closed position according to FIG. 5. During this movementthe mounting plate 2 accompanies the window sash, while the casing 5remains in its position on the mounting plate 1. When the swingingbegins the outwardly directed part 13 of the plate 14 enters through theslit 12 into the recess 15 of the flange 9 and locks the flange in thedepression 11 of the casing 5.

forced by the support flange 40.

The bearing parts according to FIGS. 1 and 2 are thus locked during theswinging of the bearing device from When the window sash has been turnedthrough 180 it can be lifted out. When the window sash, and thus alsothe mounting plate 2, is rotated, the non-circular pin 3 which isinwardly directed on the mounting plate 2, and thus also the plates 14,28 and 29 partake in the movement. The plates 21 and 22 are by means ofthe tongues 24 and 25 which enter into the slits 26 and 27, anchored tothe inner casing 10 which, by the depression '7 in the casing 5, isprevented from rotating. Between the plates 21 and 22 anchored to thecasing 10 and the plates 28 and 29 accompanying the pin 3 and betweenthe bottom 6 of the casing 5 and the mounting plate 2 there arerotatably mounted thin plates b of frictionally acting material. Thescrew 16 traversing the pin 3 and threaded into the circular disk 17actuates, upon being screwed in, the circular spring plate 20 whichunder spring pressure presses the plates 14, 21, 28, 29 and the bottom 6of the casing 5 towards the mounting plate 2 and, during rotation,effects a friction against the plates b.

When the open position of the window sash is to be limited to apredetermined position, e.g. 30, the stop pin 33 is screwed into orinserted in the mounting plate 2 and enters into the slit 34 in thebottom 6 of the casing 5, the rotation of the mounting plate 2relatively to the mounting plate 1 being dependent of the length of theslit 34.

In the embodiment according to FIGS. 8-12 the bearing device is adaptedfor vertical pivoted sashes. In such windows the pivot bearings aremounted in the bottom, and top respectively, of the frame and the sash.The flange 9 has here been replaced by the rectangular bar 37 on themounting plate 35 for the Window sash, and is adapted to be insertedinto a corresponding depression 38 in the casing 39 on the mountingplate 36 for the window frame. The mounting plate 36 has been rein- Inother respects the bearing device according to FIGS. 8 to 12 functionsin the manner as described with reference to FIGS. 1 to 7.

In the embodiment according to FIGS. 13 to 16 in combination with theembodiment according to FIGS. 8 to 12 one must now, when the window sash42 is to be lifted out from the frame 41, turn the screw 51 so that theouter threads 53 are disengaged from the threads in the mounting plate47, the stud 49 being retained in the sleeve 46 by spring action from ahelical spring 55 and must be pulled out so that the inner thread 54 canbe made to engage the threads in the mounting plate 47. Now the upperportion of the window sash can be swung, for instance inwards, and thelower sash fitting, according to FIGS. 8 to 12, be lifted out from itsframe fitting. When the window sash is to be put in, the lower sashfitting is inserted in the frame fitting and the window sash is moved tovertical position. The inner threads 54 of the screw 51 are now inengagement with the threads of the mounting plate 47, the outer portionsof the sleeves 46 and 48 resting against one another. Thereafter thelastmentioned thread engagement is released and by the action of thespring 55, the stud 49 partly returns into the sleeve 46. Thereupon thedevice is locked by screwing the outer threads 53 of the screw into thethreads of the mounting plate. If for some reason the outer threads ofthe screw should be disengaged from the thread engagement with thethreads of the mounting plate 47, the stud 49, due to the pressure ofthe spring 55, partly remains in the sleeve 46 and prevents the windowsash from getting loose from the frame.

The invention is not restricted to the embodiments disclosed anddescribed but may be modified without departing from the basic ideas ofthe invention. Thus, the T-shaped flange may be replaced by flanged pinsor bars designed in some other manner. The flange may also be locked inthe casing by a springloaded pin or the like which in the position inwhich the sash has been turned through 180 may, by means of a curvedflange, be made to release the flange. The non-circular pin may bereplaced by two pins separate from each other on which the plates areeither locked or freely running. The stop pin 33 may, by spring action,be made to automatically enter into a slit or the like after the windowsash has been swung for cleaning or the like.

What I claim is:

l. A bearing for a window comprising sash and frame elements and inwhich the window sash is swingable on a single axis in the window frame,comprising, in combination, a generally cylindrical outer casing, agenerally cylindrical inner casing fixed to said outer casing, a centralpivot having a non-circular cross-section mounted centrally of saidouter casing, brake disks mounted on said pivot, some of said diskshaving non-circular center holes and being engaged by said pivot torotate therewith, the remaining disks having circular center holes andbeing in engagement with said inner casing to rotate therewith, a springplate on said pivot urging said disks axially against each other, amounting plate fixed to one element of the window, a fiange-and-grooveconnection between said plate and said inner casing, said flange havinga transverse slit, means for securing said pivot to the other element ofthe window, and a locking member on said pivot entering said transverseslit of said flange, said locking member having a recess therein torelease said flange when the window sash has been rotated about 180 fromits closed position.

2. In a window bearing as claimed in claim 1, a stop pin. manuallyinsertable into and retractable from an arcuate slot in said outercasing.

References titted in the file of this patent UNITED STATES PATENTS929,584 Gilman July 27, 1909 1,623,428 Martin Apr. 5, 1927 2,187,464Persson Jan. 16, 1940

